Movable deflector for fluid streams



F. LALLEMAND MOYABLE DEFLECTOR FOR FLUID STREAIS June l5 1926.

Filed April 10 1924 Inventor Ferdinand Lallemand.

v rlorney Patented June 15,' 192e.

UNITED STATES FERDINAND L'ALLEMAND, 0F MARSEILLE, FRANCE.

.MOVABLE DEFLECTOR FOR FLUID S'LIZIRELAIMIS.`

Application med April 10, 1924, Serial No. 705,474, and in France April 12, 1923.

My :invention relates tomovable deiectors ing current of permanent character and the production of an irregular, or even, interrupted flow of whirls as required, the deflecting surfaces beingl driven in their relative movements exclusively bythe air current.

v2. To obtain different modes of variation of the wind direction; i. e. alternative deviawtion, towards the right or the left in the same plane, or otherwise according to the surface of a cone, or otherwise a continually rotating deviation alon the generatrix of a cone the vertex of which is constituted by the deflector centre, always without the need of a mechanical driving connection between the ventilator or fan driving shaft and the axes of the deflecting surfaces.

3. To obtain the direction variations more or less rapidly.

I attain these aims by means of the mechanism illustrated in the accompanying drawings, in which,

Fig. 1 shows in side view an'd in connection with known household electric fans or ventilators a deflector performing alternative deviations ,with two deiecting blades or wings acting upon an horizontal air current. The pivotal axis of the deflector is above -the wm s.

Flg. 2 is a front view of the device illustrated in Fig. 1.

Fig. 3 shows in front view a deilector for alternative deviations with two blades or wings in'which the axis is 'disposed below the centre of the win Fi 4 is a front view of a deflector provide with three blades in which the axis roughly coincides with the centre of the figure. p

, Fig 5 is a sectional view of'a deeetor with several blades, the movable oscillating frame of which is connected b rods with two parallel axes and in whic the move- *ment ofthe frame is limited by abutments.

Fig. 6 is a Aper 'endicular sectional view' with reference to t e axis of a wing.

Fig. 7 is a front view of the rotating deeeting wings in another form of execution.

Fig. 8 is in Fig. 7.

Similar reference characters refer to similar parts throughout the drawings.

I dispose in the air or other fluid current one or more lblades preferably parallel and of an elongated shape and receiving the impulse of the wind along the larger side.

The whole of the win s forms a sort of shutter the elements o which are each adapted to rotate upon an axis approximate# ly perpendicular to the general direction of the wind. 'A particular caseshall be described further on in connection with Fig. 4.

The wing axes are parallel to each other a side view ofthe device shown and turn as a whole about an axis approximately parallel to the general direction of the wind. Each wing axis is nearerto the wind receiving edge preferably at about onethird of the wing width counting from the wind receiving edge. The wings are pivotally mounted on their axes to allow them to assume predetermined positions due to the combined action of the fluid inertia and gravity. lThe wings are interconnected by means of rods.

For each element or wing the inclination of same with 'reference to the general direction of the fluid How is uniform or at least and direction may be obtained, changing the combination of the elements according to the direction of the wind `which may be horizontal or inclined atany angles, viz:

.1. The osition of the axis supporting the movable ame with reference to the whole o f the surfaces receiving the wind impulsion.

2. The weight of themovable portion and the position of its centre of gravity at a distance from the axis.

3. The weight of the. wing and the position of its own centre of gravity between'the wind receiving edge and its axis or on the axis, orotherwise between the wing axis and the Wind exit edge'.

Variations of deiection in working, speedy 4. The position of the wing axis with reference to the wind receiving edge, more or less at a distance but always in the portion vnearer to this edge.

5. The mode of changing the orientation of the wings at the end of each stroke, either by means of the mere action of gravity on the movable wings, when the wind direction is sensibly horizontal; or otherwise by means of stops acting -either on the carrying framing of the movable wings, or on the wings directly.

In Figs. 1 and'2 the delector is shown with a sustaining foot connected to the external casing of a known electric fan. This foot may be fixed in any suitable place, such as the base of the ventilator casing or on the protecting cage or otherwise independently of the fan. The said' supporting foot is terminated by a cylindrical portion A serving as an axis for the movable `frame, the latter being held in position by known means.

This axis is approximately in the same direction as the main initial wind direction.'

B, B are the blades, mounted onthe movable framing C and the arms D, D serve as axes. .Therods E, E are the interconnecting means. AThe framing() carries a bush F engaging upon the member A.

In thls apparatus intended for approxil mately horizontal fluid current in which the axis A is above the centre of'pressure on the wings, the centre of gravity of the .wings should be between .the -wind receiving edge and their axis.

An alternating deviation is thus obtained sweeping in leach direction a portion of `a cone surface.

In Fig. 3 in which the delector axis for horizontal currents is disposed below the centre of' pressure on the wings, the centre of gravity of the latter falls between their axes D and the iluid' exit edge.

A-counterweight or equivalent keeps the rocki' movement of the frame about its axis within `the desired angle.

In the form shown in Fig. 4, whenthe axis is in proximity to the geometric centre ofthe wing configuration or coincides with it, and the whole is 'indiiferently balanced,

' the device; placed before a fan, rotates and always in the same sense. According to the position of the centre'oi.` gravity G 'of each wing between the wing axis and the wind receiving edge, or'- between the axis and the wind exit e ge, the deviation happens in different directions.

More particularly when G is on the axis of the wmg the latter doesnot move and a uniform turnin deilection is realized.

In this case e wing a'xis is useless and I prefer to fix the `wings with reference to the-framing C (Figs. 7 and 8).`

I adjust the incidence' angle on thejwind and-` give the wings a curved shape l.giving to way (Fig. 5) provided that in this displace-v ment the wing axis remains always approximately perpendicular to the wind direction; i. e. in Fig. 5 the framing O is connected by two rods 1,' 1 to two parallel axes; the stroke is limited by the stops J, J working here in proximity of the wind receiving edge and the deiiection happens permanently in the same plane.

These devices serve for:

' Household mechanically driven fans, ventilation in vgeneral flowing Huid mixing plants without external motive power; as a wind disperser for vehicles; production of motive power(preiferably with alternating deflectors) volume or speed measuring apparatus for moving fluids, advertising devices and toys.

I am' aware that previous to my finvention air current deilectors have been used' and I do not claim the deiectors broadly.

What I claim isz- 1. Dei'lectors-for iuid -currents comprising a plurality of deiecting wings moved exclusively by the fluid current having each an axis which is approximately perpendicular to the direction of the current, the axis of each wing being placed nearer the fluid receiving edge of the wing the angle of inclination being throughout in the same sense alon the length of the wing.

2. Pl)eilectors for fluid streams moved exclusively by the fluid stream comprising a movable frame and a series of movable wings carried thereby, the said wings constantly moving about their axes, and the frame moving about an axis which remains approximately parallel to the .direction of the wind.

3. Deflectors for fluid streams moved exclusively by the iuid stream, comprising constantly moving pivoted deflecting surfaces which take positions predetermined by the combination of the gravity inertia and the action of the current on the wings.

4. Deflectors for Huid streamsmoved exclusively by the fluid stream, comprisin a constantly moving frame, defiecting bla es inclined, with re erenee to the wind ,direction, in the same sense .throughout their length, slaid -blades being adjusta ly fixed on the constantly Amoving frame, win and frame as a whole being indiferenty balanced with reference to anaxis the direction of which is approximately parallel to the wind direction; the lframe moving at a speed determined by the diference of inclination of the wings along their length.

5. Deflectors for Huid streams moved exclusively by the fluid stream, comprising a rotatable framing, and a plurality 4of approximately parallelly dlsposed inclined wings, and fixed to the framing, the axis of rotation to the center of said plurality of wings so as to obtain the required speed of revolution.

In testimony whereof I have signed my name tol this specification.

FERDINAND LALLEMAND. p

being displaced with reference 10 

